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+" Vim indent file
+" Language: Objective-C
+" Maintainer: Kazunobu Kuriyama <kazunobu.kuriyama@nifty.com>
+" Last Change: 2004 May 16
+"
+
+
+" Only load this indent file when no other was loaded.
+if exists("b:did_indent")
+ finish
+endif
+let b:did_indent = 1
+setlocal cindent
+
+" Set the function to do the work.
+setlocal indentexpr=GetObjCIndent()
+
+" To make a colon (:) suggest an indentation other than a goto/swich label,
+setlocal indentkeys-=:
+setlocal indentkeys+=<:>
+
+" Only define the function once.
+if exists("*GetObjCIndent")
+ finish
+endif
+
+function s:GetWidth(line, regexp)
+ let end = matchend(a:line, a:regexp)
+ let width = 0
+ let i = 0
+ while i < end
+ if a:line[i] != "\t"
+ let width = width + 1
+ else
+ let width = width + &ts - (width % &ts)
+ endif
+ let i = i + 1
+ endwhile
+ return width
+endfunction
+
+function s:LeadingWhiteSpace(line)
+ let end = strlen(a:line)
+ let width = 0
+ let i = 0
+ while i < end
+ let char = a:line[i]
+ if char != " " && char != "\t"
+ break
+ endif
+ if char != "\t"
+ let width = width + 1
+ else
+ let width = width + &ts - (width % &ts)
+ endif
+ let i = i + 1
+ endwhile
+ return width
+endfunction
+
+
+function GetObjCIndent()
+ let theIndent = cindent(v:lnum)
+
+ let prev_line = getline(v:lnum - 1)
+ let cur_line = getline(v:lnum)
+
+ if prev_line !~# ":" || cur_line !~# ":"
+ return theIndent
+ endif
+
+ if prev_line !~# ";"
+ let prev_colon_pos = s:GetWidth(prev_line, ":")
+ let delta = s:GetWidth(cur_line, ":") - s:LeadingWhiteSpace(cur_line)
+ let theIndent = prev_colon_pos - delta
+ endif
+
+ return theIndent
+endfunction